Watchcase heater



May 15, 1928. r 1,670,284

H. A. DENMIRE WATCHCASE HEATER Filed" Feb. 25, 1927 2 Sheets-Sheet l INVENTOR Harold FLDenmire BY 5 3 ATTORNEYS May 15, 1928. V H. A. DENMIRE WATCHCASE" HEATER 2 Sheets-Sheet 2 Filed Feb. 25, 1927 .INVENTOR .Hamld R.Denm|re BY 5 I &

'ATTORNE PatentedMay 51928. a

UNITED STA TBS/PATIENT OFFICE- HAROLD A. DINIIBE; OI AKRON, OHIO, ASSIGNOB TO THE GENERAL TIRE &

COMPANY, OF AKRON, OHIO; A. CORPORATION OI OHIO.

WATCHGABE HEATER. 1

Application filed February 2b,.1927. jerial No. 170,826

This invention relates to heaters for vulcanizing rubber articles and it particularly pertains to an improved form of watch case heater.

Watch case vulcanizin units of the character now generally user? are usually closed by some form of mechanical screw or wedge arrangement in which the wedging surfaces come to substantially the same clamping position after each operation. The screw or wedging apparatus is generally operated by an hydraulic plston arrangement. When a side elevational view of a watc vulcanizers of this character are used re eatedly over a long'period of time the we ging surfaces of the clamping members become worn at the clamping position, with the vulcanizing unit The object of the present invention is to provide a simple and quickly operative vulcaniz' heater of the watch case type that will be lndependent of localized surface wear of the clamping members and that will require a minimum of repair during its operatin life. f

. An a ditional object of the invention is to provide a heater of the above designated character that requires very little floor space and that ma be operated b less skilled operators wit out danger of amage to the heater parts. k

Figure 1 of the accompanying drawing is case heater constructed in accordance with the invention.

Fi 2-is a transverse sectional view of the watc case heater shown in Fig. 1 taken substantially on line 2-2 of Fig. 1.

Fig. 3 is a detailed transverse sectional view of a portion of the heater showing the replaceablemold shell thereof. 7

. The watch case heater shown in the accompanyin drawing comprises a heater base 1 to-which is hin ed the heater doors 7 2 and 3. Each heater ooi has a mold shell 4 mounted therein: The opposing mold shell 5 of each pair is mounted in the heater base.

lever 8 has one end pivota y mounted on' the vertically p pintle 9 adjacent a pintle supporting lug 10 that, is formed on rod 12; Thepiston rod 12 extends throu h It is particularly im ortantthat the closingthe heater base. The other end of the lever 8 txtends beyond the heater door where. it is engaged by a pivoted stirru .11 that is carried at the end of the hy aulic--piston a suitable packing gland 13 intoan hydrau ic cylinder 14 that is formed in the heater. base. A suitable iston 15 is carried upon theinner end of t e piston rod.

Suitable pins 17 that are respectively carried by lugs 18 that are arranged on opposite sides of the levers 8 connect the lever with the door sothat it may be operated therefrom.

The heater doors are pivotally supported from arms; 16 that are mounted on the intle 9. The pintle 9 is supported from the eater base adjacent each end by suitable In S 17 The operation of'the heater is particularl simple. After the mold cavity is cha'rg the door is closed and the stirru is swun over the end of the lever. A p lication o hydraulic pressure to the hy aulic piston closes the door of the heater with any desired degree of pressure. The heater door is opened by releasing the hydraulic pressure and preferably applying air pressure to the opposite side of the piston to force it to "its necting rod. v

It will be obvious to those skilled in the art that the closing lever may be arranged, in. diiferent ways with respect to the heater door without departing from the invention.

pressure be applie substantially at the centerof the heater door. It will alsobe obvious that the heater may be "used for the vulcanization, of either solid or hollow ob- 'ects such as vehicletir'e casingsyinner tubes, ad rings, etc. I desire therefore that the invention be construed as broadly" as. the pnorartwillperp itfi I 05 seating to insurea straight pull on the con.- Y

' base, I 10 "a mold shell carried y the door ada ted to mate'with the mold shell carried by t e base to define therewith a molding cavity, a door closin lever pivotally supported from the ydrauhc means carried by the base for acting on the free end of'said lever to close said heater, and means for releasably engaging the lever and the hydraulic means.

2. A watch case heater comprising a heater base, a mold shell carried by the base, a. door swingably supported from the base, a mold shell carried by the door and adapted to mate with the mold shell carried by the base'to define therewith a molding cavity, a door closing lever pivotally supported from the base concentrically with t e ivotal support for the door, said lever ing adapted to engage the door in a zone substantia spect to the molding cavity, hydraulic means carried by the base and adapted to releasably engage the free end of said lever for closing the heater.

\3. A watch case heater comprising a heater base, a mold shell carried by the base, a door swingably sup orted from the base, a mold shell carried y. the door adapted to mate with the mold shell carried by the base to define therewith a molding cavity,

ly centrally arranged with re and to provide between the mold shell and the door a cavit for receiving heating fluid, a door closing ever adapted to move with the door and pivotally mounted on the base coaxially with the mounting for the door, an hydraulic cylinder carried by the heater base adjacent the free end of the lever, a piston mounted in the cylinder, a readily releasable connection for joining the piston with the free end of the lever, and means carried by the door engaging the lever in a zone substantially concentricwith the molding cavity of the heater.

4. A vulcanizing heater comprisin a heater base-carrying a mold member, a door swingably supported from the base, said door and mold member being shaped to de v fine a moldin cavity therebetween and means arrange to cooperate with said door for closing said door against said mold member and maintaining said door against said mold member 'under pressure during a heating operation, said closing means comprising a lever pivoted on said base, hy-

raulic means carried by the base arranged to cooperate with and move said lever, and releasable conriectin -means intermediate said door and hydra '0 means whereby said door may be moved to substantially full open position after a'heating operation is completed. 1

In testimony whereof- I aflix my signature.

HAROLD .A. DENMIBE- 

